Stihl MSA 80 C Chains (Fit & Sizing Guide)
For the STIHL MSA 80 C, match the chain to the fitted bar, not just its length. The specified Picco setup uses 1/4-inch P pitch and .043-inch (1.1 mm) gauge, but drive-link count and bar details can vary. Check the bar stamp and your saw’s manual before buying. This 36 V battery saw needs bar-and-chain oil, not mixed fuel.
A chain that drags, burns wood, or will not sit correctly on the bar is a reason to stop and check the fit. The right replacement is not simply “a chain for a 12-inch bar.” Pitch, gauge, drive-link count, and bar mount all matter. Match each one before fitting a chain or heading out to cut.
The MSA 80 C belongs to STIHL’s AK battery system and runs on a nominal 36 V platform. It is not a petrol saw, so fuel mix, carburetor settings, and engine idle speed do not apply. Use an approved, compatible battery and charger, and fill the oil reservoir with quality chainsaw bar-and-chain oil.
Equipment Setup, Chain Fit & Safety Preparation
This section covers the details that decide whether a chain fits the MSA 80 C safely: the bar mount, pitch, gauge, and drive-link count. The specified Picco setup uses 1/4-inch P pitch and .043-inch (1.1 mm) gauge. Check the exact bar and manual before ordering, because bar length alone does not identify a chain.
Which chain fits an MSA 80 C?
A compatible chain must match the bar’s pitch, gauge, and required drive-link count, as well as the saw’s bar mount. Pitch is the spacing of the chain’s drive links; gauge is the thickness of the drive links that sit in the bar groove. Both must match the bar.
| What to match | MSA 80 C setup information | What to check |
|---|---|---|
| Power system | STIHL AK, nominal 36 V | Use a compatible, approved battery and charger |
| Chain pitch | 1/4-inch STIHL Picco (1/4″ P) | Confirm the bar stamp and manual |
| Chain gauge | .043 inch (1.1 mm) for the matching Picco Micro 3 setup | Confirm the bar stamp; do not substitute by guess |
| Drive-link count | Depends on the fitted bar and market version | Count the links or read the bar and chain markings |
| Bar length | May vary by supplied or replacement bar | Check the actual bar, not an assumed standard |
| Lubrication | Automatic chain lubrication | Fill the oil reservoir with bar-and-chain oil |
Drive links are the small tabs on the chain’s underside that ride in the bar groove. The correct number depends on the actual bar. A 12-, 14-, or 16-inch label does not, by itself, tell you the right chain count. Similar-length bars can differ in construction and chain requirements.
Before ordering, look for markings on the bar, often near the mounting end. Record the pitch, gauge, and drive-link count if shown. Compare those details with the saw’s operator’s manual and the replacement chain packaging. If the markings are unreadable or conflict with the manual, ask a STIHL dealer to identify the bar before buying.
Safe chain installation, step by step
Installing a chain with the battery removed reduces the risk of accidental starting. Work on a stable surface, wear gloves, and follow the model’s manual for cover removal and tensioning. The chain must face the correct direction, sit fully in the bar groove, and move freely by hand before the battery goes back in.
- Prepare the saw. Switch it off, engage the chain brake, and remove the battery. Let the cutting attachment stop fully. Wear gloves when handling the chain.
- Check the parts. Confirm the replacement chain matches the bar’s pitch, gauge, and drive-link count. Inspect the bar rails, sprocket, chain, and chain brake for wear or damage.
- Fit the chain. Follow the manual to loosen the bar and remove the cover. Seat the drive links in the bar groove and around the sprocket. On the top of the bar, the cutter edges must face toward the bar nose.
- Set tension. Use the saw’s tensioning method and the manual’s instructions. The chain should sit in the groove without sagging, while still moving around the bar by hand with the battery removed. Do not overtighten it.
- Check before cutting. Refit and secure the cover as directed. Fill the oil reservoir with bar-and-chain oil. Recheck chain movement and tension; insert the battery only when you are ready to operate.
A chain that is too loose can come off the bar; one that is too tight adds strain and may not move freely. Check tension again after use begins and during work, following the manual. A newly fitted chain may need more frequent checks as it settles. Never adjust it with the battery installed.
Field Cutting and Landscaping Operation
The MSA 80 C is a battery chainsaw for suitable pruning and light-to-moderate cutting within the limits in its model- and market-specific manual. Safe cutting depends on a sound, lubricated chain, stable footing, and control of the bar nose. Do not use a mismatched or damaged chain, or force a dull one through wood.
Before starting, check the work area for overhead hazards, bystanders, and a clear escape route. Wear a helmet, eye and face protection, hearing protection, chainsaw-protective legwear, gloves, and suitable footwear. Follow the manual and local safety rules. Keep a firm two-handed grip and work from a stable position.
The chain brake is an important safety feature, but it does not make every cutting position safe. Contact between the upper quadrant of the bar nose and wood or another object can cause kickback, a rapid upward and backward movement of the saw. Keep the nose clear, avoid tip-first cuts, and do not cut above shoulder height.
Two common fit checks: If a replacement chain appears too long, do not remove links to make it fit. Recheck the drive-link count and the bar’s required chain. If it feels tight even with the tension adjuster released as directed, stop and verify the pitch, gauge, and link count. Forcing either mismatch risks poor tracking or damage.
Once the chain is fitted, check that it receives oil as directed in the manual. The MSA 80 C has automatic chain lubrication, but STIHL does not specify a user-adjustable oil-flow rate or a fuel-style oil-mix ratio. A full oil tank is not proof by itself that the chain is being lubricated. Stop if lubrication seems absent, and inspect according to the manual.
Chain Inspection, Sharpening & Bar Maintenance
Regular checks help catch poor fit, wear, and lubrication problems before they become a cutting hazard. A sharp, correctly tensioned chain should cut without being forced. Inspect the chain and bar with the battery removed, and use the sharpening instructions for the exact chain type rather than applying a guessed file size or angle.
In the shop, I treat a new chain that will not track smoothly as a fit problem first, not a sharpening problem. Recheck the markings and seating before filing or cutting. For the Picco Micro 3 setup, use the chain’s packaging or STIHL sharpening information to confirm the file and filing angles; do not guess from a different chain family.
Stop and inspect if the saw cuts unevenly, produces fine dust instead of chips, needs pressure to advance, or the chain no longer moves freely. These signs can point to a dull chain, poor tension, bar wear, or another fault. Do not keep cutting to “wear it in.” Remove the battery before inspecting or cleaning.
A practical check sequence:
- Chain: Look for damaged or missing cutters, cracked links, and signs of unusual wear. Replace a damaged chain; sharpening cannot repair structural damage.
- Tension: Check it as the manual directs. The chain must stay seated in the groove without excessive slack, and it must move by hand with the battery removed.
- Bar: Clear chips from the groove and oil opening. Check the rails for damage or uneven wear. Do not reshape or repair a damaged bar unless the manual or a qualified service provider says it is serviceable.
- Sprocket and brake: Inspect for wear and correct operation. If a part is damaged or the brake does not work as intended, stop using the saw and arrange service.
For sharpening, identify the exact chain first. File diameter, filing angle, and depth-gauge setting depend on the chain specification. Use the chain packaging or STIHL instructions as the reference, keep the cutters even, and avoid removing more material than needed. If the chain’s identity is unclear, get it identified before filing.
Battery, Storage & Seasonal Care
Battery care and chain care are separate jobs: the battery powers the saw, while bar-and-chain oil lubricates the cutting attachment. Remove the battery before cleaning, inspection, or chain adjustment. Follow the battery and charger instructions for charging and storage, and store the saw with its chain guarded and the oil system maintained as the manual directs.
After cutting, release the trigger, engage the chain brake, and remove the battery before cleaning. Wait for the chain to stop. Clear chips and debris from the cutting area, then inspect the chain, bar, and tension. If you find damage, do not put the saw back to work until the issue is corrected.
For storage, fit the chain guard and choose a dry, secure place away from children. Store and charge the battery and charger according to their own instructions. Before the next job, check chain fit and tension, inspect the bar and chain, and confirm the oil reservoir has suitable bar-and-chain oil.
Quick answers before you buy
Use this table as a final check when comparing replacement chains or diagnosing a fit issue. The bar stamp and the operator’s manual take priority over assumptions based on saw name or bar length. If the details do not agree, pause and have the bar identified before ordering or operating.
| Situation | Next step |
|---|---|
| You know the bar length but not the chain count | Read the bar stamp or manual; do not order by length alone |
| The chain fits the bar but not the sprocket | Stop and confirm the pitch and the saw’s specified setup |
| The chain sags or binds after fitting | Remove the battery and reset tension by the manual |
| The chain cuts slowly or needs force | Stop, inspect sharpness, tension, and lubrication |
| The oil tank is empty | Refill with bar-and-chain oil; do not add petrol or fuel mix |
| Bar markings are missing or unclear | Ask a STIHL dealer to confirm the replacement bar and chain |
Bottom line: For the MSA 80 C, begin with the bar stamp and manual, then match pitch, gauge, drive-link count, and mount. The specified Picco setup is 1/4-inch P with .043-inch (1.1 mm) gauge, but the correct chain still depends on the fitted bar. Keep the battery out during fitting and inspection, and use bar-and-chain oil.
Frequently Asked Questions
What chain pitch does the MSA 80 C use?
The specified cutting attachment uses 1/4-inch STIHL Picco pitch, marked 1/4″ P. Confirm the fitted bar’s stamp and your manual before ordering a replacement.
What chain gauge does it use?
The matching STIHL Picco Micro 3 setup uses .043 inch (1.1 mm) gauge. Verify the bar marking, since the chain gauge must match the bar groove.
How many drive links does the chain need?
It depends on the fitted bar and market version. Read the bar stamp or count the drive links on the correct existing chain; do not assume from bar length.
Can I buy a chain by bar length alone?
No. The bar length does not confirm pitch, gauge, drive-link count, or mount. Match all required details to the actual bar and saw manual.
Does the MSA 80 C use mixed fuel?
No. It is a nominal 36 V battery saw in STIHL’s AK system. Fuel mix and carburetor tuning do not apply.
What oil goes in the chain-oil tank?
Use quality chainsaw bar-and-chain oil. The saw has automatic chain lubrication; do not add petrol or prepare a fuel-style oil mix for the reservoir.
Can I use any 1/4-inch P chain?
No. It must also match the bar gauge, drive-link count, and saw setup. Check the chain packaging against the bar markings and manual.
Why does my chain feel tight after installation?
It may be tensioned too tightly or may not match the bar and sprocket. Remove the battery, then recheck fit and tension using the manual’s procedure.
What file size and angle should I use?
They depend on the exact chain type. Check the chain packaging or STIHL sharpening instructions; do not guess or copy settings from another chain.
Can I keep cutting with a dull chain?
No. A dull chain can cut poorly and may tempt you to force the saw. Stop, remove the battery, and inspect and sharpen or replace the chain as needed.
(This article was written by one of our staff writers, David Hensley. Visit our Meet the Team page.)
